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23 lines
696 B
SQL
23 lines
696 B
SQL
-- step 1: create a temporary table to store the rows we want to keep
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CREATE TEMP TABLE embeddings_temp AS
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SELECT DISTINCT ON (chunk_id) *
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FROM embeddings
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ORDER BY chunk_id, random();
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--> statement-breakpoint
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-- step 2: delete all rows from the original table
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DELETE FROM embeddings;
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--> statement-breakpoint
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-- step 3: insert the rows we want to keep back into the original table
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INSERT INTO embeddings
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SELECT * FROM embeddings_temp;
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--> statement-breakpoint
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-- step 4: drop the temporary table
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DROP TABLE embeddings_temp;
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--> statement-breakpoint
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-- step 5: now it's safe to add the unique constraint
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ALTER TABLE "embeddings" ADD CONSTRAINT "embeddings_chunk_id_unique" UNIQUE("chunk_id");
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